Electrochemical Investigation of C-Steel Corrosion Inhibition, In Silico, and Sulfate-Reducing Bacteria Investigations Using Pyrazole Derivatives

The inhibitory impact of the two synthesized pyrazolederivatives(3 and 4) toward metallic and microbialcorrosion was investigated. Using open circuit potential, potentiodynamicpolarization, and electrochemical impedance spectroscopy, it was possibleto determine their ability to prevent the corrosion of C-steel in1 M HCl, which was significantly enhanced with increasing concentration(ex. 93%). They act as mixed-type inhibitors, according to polarizationcurves. The compounds under investigation were adsorbed on a C-steelsurface in 1 M HCl following the Langmuir isotherm model. The double-layercapacitance was decreased, and the charge transfer resistance (R (ct)) was raised due to the examined inhibitors'adsorption. Investigating changes in the surface morphology and confirmingthe corrosion inhibition mechanism are done using scanning electronmicroscopy. Density functional theory calculations and Monte Carlosimulations were also conducted to show the adsorption affinity ofthe understudied compounds over the steel substrate in neutral andprotonated forms. Furthermore, the antimicrobial performance of thetwo synthesized pyrazoles against sulfate-reducing bacteria was evaluated,and the recorded inhibition efficiency was 100%. The current researchshows important developments in producing highly effective anticorrosionand antimicrobial pyrazole derivatives.

Automated summary

The inhibitory effect of two synthesized pyrazole derivatives (3 and 4) on metallic and microbial corrosion was investigated. The compounds demonstrated the ability to prevent corrosion of C-steel in 1 M HCl with increasing concentration. They acted as mixed-type inhibitors and followed the Langmuir isotherm adsorption model. The research also highlighted the antimicrobial performance of the compounds against sulfate-reducing bacteria.